This Time to Teach study collates and strengthens the evidence base on primary school teacher absenteeism in Mozambique. The study uses a mix of qualitative and quantitative research methods to provide critical insights into the factors that underpin the multiple forms of teacher absenteeism and time on task. It also examines how factors vary across countries, school types, gender of teacher and other teacher characteristics. Despite high levels of teacher absenteeism, the study shows that teachers are generally committed and that what is needed is education system strengthening. It is hoped that findings will inform workable solutions and policies that will ensure a motivated teaching force, increase opportunities for children to learn at school and, ultimately, improve their life and work opportunities.